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SUMMARY:Benjamin Lehmann\, MIT\,  [HET Seminar] Broadening direct searches
  for light dark matter
DTSTART:20260716T150000Z
DTEND:20260716T170000Z
DTSTAMP:20260716T155800Z
UID:indico-event-32624@indico.bnl.gov
DESCRIPTION:Direct searches for low-mass DM were originally designed using
  the same conceptual picture as WIMP searches. However\, over the last fiv
 e years\, the crucial role of in-medium effects has come into sharp focus.
  A new theoretical framework in the language of condensed matter physics h
 as emerged for understanding the relationship between the properties of de
 tector systems and their sensitivity to DM interactions. I will report on 
 three recent advances that leverage this formalism to substantially broade
 n the design considerations for the next generation of experiments\, and e
 ven extract new constraints from existing data. First\, for DM–electron 
 interactions\, large new datasets generated by the materials science commu
 nity have enabled the first data-driven search for optimal detector materi
 als\, which promises to significantly enhance the sensitivity of near-futu
 re experiments. Second\, just as detectors designed to detect nuclear scat
 tering have been used to study electronic scattering\, I will explain how 
 in-medium effects make the reverse possible as well\, allowing us to set n
 ew limits on DM–nucleon scattering using the low-threshold detectors des
 igned to detect electronic scattering. Third\, with the advent of low-thre
 shold detectors sensitive to energy deposits as low as 50 meV\, we have fi
 nally entered the regime where the interaction rate can be significantly e
 nhanced due to the geometry of the detector system. These three considerat
 ions promise to substantially accelerate the search for light DM in both m
 ass and cross section over the coming years.\n \n \nhttps://bnl.zoomgov.
 com/j/16010362754?pwd=Z1l1SS9JUDlyR1hSUHNyaDV1dTZHUT09 \n\nhttps://indico
 .bnl.gov/event/32624/
LOCATION:Small Seminar Room
URL:https://indico.bnl.gov/event/32624/
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